Restrict the operations on drv outputs in recursive Nix
Restrict the operations on drv outputs in recursive Nix

There's currently no way to properly filter them, so disallow them
altogether instead.

rycee/nix,NixOS/nix,rycee/nix,NixOS/nix,NixOS/nix,rycee/nix,rycee/nix,rycee/nix,NixOS/nix,NixOS/nix